The objective was to determine the relative tolerance of two accessions of Brachiaria brizantha (BRS Ybaté and B144) to flooding. For this, the morphological and physiological responses of accessions were compared with marandu grass (B. brizantha ‘Marandu’), in plants grown in pots, under flooding and well drained. Flooding reduced the daily rate of leaf elongation of the evaluated genotypes. The relative growth rate, production of total biomass and production of leaves, stems and roots were reduced by flooding in cultivars BRS Ybaté and Marandu, however, it was not possible to detect differences between treatments for accession B144. Only the carbon allocation to leaves was affected by flooding, being lower in this treatment. Flooding significantly reduced net photosynthesis, stomatal conductance and transpiration in both accessions. It is possible to conclude that the accession B144 is relatively more tolerant to flooding than the cultivar BRS Ybaté.
Relative tolerance of two accessions of Brachiaria brizantha to soil flooding
/ Moacyr Bernardino Dias-Filho…[et al.] . – Belém, PA : Embrapa Amazon
Oriental, 2019.
24 p. : il. ; 16 cm x 22 cm. – (Research and development bulletin / Embrapa
Eastern Amazon, ISSN 1983-0483; 138).
1. Brachiaria brizantha. 2. Flooded soil. 3. Cultivate. 4. Cultivating behavior.
5. Forage grass. I. Dias-Filho, Moacyr Bernardino. II. Embrapa Amazon
Eastern. III. Series.
Adicionado em novembro, 2019
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